ppm2pwg - misc printing format conversion utilities

(should really be renamed)

Available as rudimentary standalone applications, but mainly made for use in SeaPrint.

ppm2pwg

Takes a pbm, pgm or ppm (P4, P5 or P6 "raw") Netpbm bitmap image and converts to PWG or URF printer raster format.

...or a raw bitmap in the c++ api.

pwg2ppm

For debugging. Similar to rasterview, but without a GUI. Takes a PWG or URF printer raster and outputs a series of P4, P5 or P6 pbm/pgm/ppm images.

pdf2printable

Takes a PDF document and makes it suitable for printing, by:

• rotate and scale to fit as needed to a desired page size
• convert to PDF 1.5, Postscript 2 or PWG/URF raster

baselinify

Takes a JPEG and losslessly repacks it to the baseline ecoding profile, keeping only JFIF and Exif headers. Sort of like jpegtran without any arguments, but reusable in C++.

IPP-printers are only required to support baseline-encoded jpeg according to PWG5100.14.

Despite working with in-memory data, it only requires the libjpeg 62.2.0 and not 62.3.0/7.3+ API, so it works on conservative distros.

Building

Install dependencies:

sudo apt install libpoppler-dev libpoppler-glib-dev libcairo2-dev libglib2.0-dev libjpeg-dev

Build:

make -j$(nproc)